US 12,334,720 B2
Structure for attaching grating lid onto resin trough body; trough track; trough track forming method; and grating lid
Hiroki Manabe, Tokyo (JP); and Takashi Hori, Tokyo (JP)
Assigned to FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed by FURUKAWA ELECTRIC CO., LTD., Tokyo (JP)
Filed on Mar. 9, 2023, as Appl. No. 18/119,582.
Application 18/119,582 is a continuation of application No. PCT/JP2021/033625, filed on Sep. 14, 2021.
Claims priority of application No. 2020-154918 (JP), filed on Sep. 15, 2020.
Prior Publication US 2023/0216287 A1, Jul. 6, 2023
Int. Cl. H02G 9/04 (2006.01); E03F 5/06 (2006.01)
CPC H02G 9/04 (2013.01) [E03F 5/06 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A structure for attaching a grating lid onto a trough body that is made of resin, the trough body comprising:
a substantially U-shaped cross section having a bottom section and two side sections, wherein
vertical ribs for reinforcement are formed at regular intervals on outer faces of both side sections of the trough body having a predetermined length;
the two vertical ribs are formed in proximities of each of front and back ends of the trough body and a horizontal rib for attaching an L-shape member is formed at the proximities of each of the front and back ends of the trough body so as to link the two vertical ribs;
the predetermined number of the vertical ribs are disposed at regular intervals between the vertical rib at the front end and the vertical rib at the back end of the trough body, and another horizontal rib is further formed at a bottom part of the side section of the trough body so as to link the vertical ribs;
L-shape members are disposed such that a horizontal surface of a steel material having an L-shape cross section of each of the L-shape members faces a metallic fixing member of the horizontal rib, the L-shape members covering top parts of the side sections of the trough body;
an accommodation space for accommodating the grating lid is formed by the L-shape members being fixed with bolts to the metallic fixing members attached to the horizontal ribs, and the grating lid is accommodated in the accommodation space; and
the grating lid is fixed to bolt fixing sections, which are mounting holes formed in the horizontal surfaces of the L-shape members.
 
7. A structure for attaching a grating lid onto a trough body that is made of resin, the trough body comprising:
a substantially U-shaped cross section having a bottom section and two side sections, wherein
the trough body having a predetermined length is provided with a male fitting portion on one end and a female fitting portion on the other end, the male fitting portion and the female fitting portion being able to be fitted with each other;
the male fitting portion has a reduced diameter portion at which a cross section of the male fitting portion has a reduced diameter, and an enlarged diameter portion being formed at a tip end of the reduced diameter portion where the cross section is bent outward;
the female fitting portion has an enlarged diameter portion at which a cross section of the female fitting portion has an enlarged diameter for accommodating the male fitting portion, and a reduced diameter portion being formed at a tip end of the enlarged diameter portion where the diameter of the cross section is reduced;
vertical ribs for reinforcement are formed at regular intervals on outer faces of both side sections of the trough body having the predetermined length;
the two vertical ribs are formed in proximities of each of front and back ends of the trough body and a horizontal rib for attaching an L-shape member is formed at the proximities of each of the front and back ends of the trough body so as to link the two vertical ribs;
the predetermined number of the vertical ribs are disposed at regular intervals between the vertical rib at the front end and the vertical rib at the back end of the trough body, and another horizontal rib is further formed at a bottom part of the side section of the trough body so as to link the vertical ribs;
L-shape members are disposed such that a horizontal surface of a steel material having an L-shape cross section of each of the L-shape members faces a metallic fixing member of the horizontal rib, the L-shape members covering top parts of the side sections of the trough body;
an accommodation space for accommodating the grating lid is formed by the L-shape members being fixed with bolts to the metallic fixing members attached to the horizontal ribs, and the grating lid is accommodated in the accommodation space; and
the grating lid is fixed to bolt fixing sections, which are mounting holes formed in the horizontal surfaces of the L-shape members.
 
20. A grating lid that is to be fixed on an upper part of side sections of a trough body, the grating lid comprising:
a structure in which multiple gratings are formed inside a substantially rectangular-shaped frame body, wherein
a part of the gratings is notched at proximities of each of the front and back ends of the grating lid;
a steel plate with a mounting hole is welded to the notched parts to form bolt fixing sections of the grating lid; and
an L-shape flange member, which is bent into an L shape, is fixed to one side of a longitudinal direction of the grating lid, the L-shape flange member being formed with a tongue-shaped projection that has a length equivalent to a connected part between the trough bodies.